I have a little problem that I can't understand. We developed a new version of an existing website. This was developed locally, then transferred to a new server. The final change was to update the DNS of the domain name so that it would resolve to the IP of the new server. My client says he can see the site now, but I can't. I thought it was weird, but maybe the change was not fully spread around the internet, so I decided to wait. Then I decide to look at the site from my other computer, which runs ubuntu. The site works there, and I see the new version. This is even more weird, right? especially considering they are both connected to the same network and access the web with the same internet connection. So, I decided to take a look at the site on my tablet, and it also works. Then my phone, which connects to the internet using my carrier's internet service. The site also works on my phone.
The question is, why would it not work on one of the computers? Lets forget about the tablet, and the phone for a minute.
I have two computers, one runs Ubuntu, the other runs windows 7. The one running windows 7 point the domain name to it's old IP, and the one running ubuntu resolves the domain to the new IP. They are both connected to the same internet access point. I thought maybe I changed the DNS on Ubuntu at some point and I don't remember, but then I never changed them on the tablet, and it resolves to the new IP too. So, my only guess is that windows 7 has its own DNS, is that true? or what is going on?